[Bug c++/102610] [C++23] P2036R3 - Change scope of lambda trailing-return-type

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102610

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Created attachment 59623
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59623&action=edit
WIP patch

Regtested/bootstrapped patch that needs polishing for GCC 16.